Howitzer, Medium Self Propelled 155mm m109a6

TM 9-2350-314-10See page i for details.

OPERATORS MANUAL

OPERATORS CONTROLS AND INDICATORS PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) OPTICAL FIRE CONTROL AUTOMATIC FIRE CONTROL SYSTEM (AFCS)

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2-13 2-133 2-138

HOWITZER, MEDIUM, SELF-PROPELLED: 155MM, M109A6 (NSN 2350- -305-01-0028) (EIC: 3FC)

PALADIN DIGITAL FIRE CONTROL SYSTEM (PDFCS) PREPARATIONS FOR FIRING THE HOWITZER TROUBLESHOOTING

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2-259 3-43

Distribution Statement A: Approved for public release; distribution is unlimited.

FIRE CONTROL ALIGNMENT TESTS AND MEASUREMENTS AMMUNITION

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1997 United Defense, L.P. All rights reserved under the copyright laws.

This material may be reproduced for U.S. Government purposes only, pursuant to the copyright license under the clause at (DFARS 52.227--7013) dated October 1988.

HEADQUARTERS, DEPARTMENT OF THE ARMY FEBRUARY 1999

TM 9-2350-314- -1 -20-

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TM 9-2350-314-10

WARNING

RADIOACTIVE MATERIAL(S)

TRITIUM (HYDROGEN- GAS -3)This item contains radioactive material. Control of this radioactive material is mandated by federal law. Immediately report any suspected lost or damaged items to your Radiation Safety Officer (RSO). If your RSO cannot be reached, contact the TACOM--ACALA safety office. Handle with care. In the event the radioluminous source is broken, cracked, or there is no illumination, immediately wrap device in plastic bag (item 5, Appendix D) and notify the local RSO. Contact the base safety office for the name and telephone number of your local RSO: LOCAL RSO: TELEPHONE: SAFETY PROCEDURES FOR NUCLEAR REGULATORY COMMISSION (NRC) TRITIUM FIRE CONTROL DEVICES 1. Purpose: To implement mandatory license requirements for use and maintenance of tritium radioluminous fire control devices used on howitzers, mortars, tanks, and rifles. 2. Scope: This procedure is applicable to all personnel working with tritium devices, including unit, direct support, general support maintenance; and operators levels. 3. Radiological hazard: The beta radiation emitted by tritium presents no external radiation hazard. However, if taken internally, it can damage soft tissue. If a capsule is broken, the tritium gas will dissipate into the surrounding air and surfaces near the vicinity of the break may become contaminated. Tritium can be taken into the body by inhalation, ingestion, or skin absorption/injection. 4. Safety precautions: a. Check for illumination prior to use or service in low light or darkroom. If not illuminated, do not repair. Wrap the entire device in plastic bag (item 5, Appendix D) and notify the local RSO. No eating, drinking, or smoking will be allowed in tritium device work areas.

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5. Emergency procedures: If a tritium source breaks, inform other personnel to vacate the area or move upwind. If skin contact is made with any area contaminated with tritium, wash immediately with nonabrasive soap and water. Report the incident to the local RSO. Actions below will be taken under supervision or direction of the local RSO. Change 2 a

TM 9-2350-314-10 a. Personnel handling the tritium device should wear rubber or latex gloves (item 17, Appendix D). Device must be immediately double wrapped in plastic, sealed with tape (item 39, Appendix D), and marked as Broken Tritium Device Do Not Open per RSO direction. Dispose of used gloves as radioactive waste, per instructions from local RSO and wash hands well. Personnel who may have been exposed to the broken tritium device should report to health clinic for tritium bioassay. Optimum bioassay sample is at least 4 hours after exposure. Broken tritium sources indoors may result in tritium contamination in the area, such as work bench or table. The area must be cordoned off, restricted until wipe tests indicate no contamination.

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6. Further information: a. Requirements for safe handling and maintenance are located in TM 9--254, General Maintenance Procedures for Fire Control Materiel. If assistance is needed, contact your local or major command (MACOM) safety office(s) for information on safe handling, shipping, storage, maintenance, or disposal of radioactive devices. The ACALA RSO/licensee may be contacted by calling: DSN 793--2965/2969/2995, Commercial (309) 782--2965/2969/2995. After duty hours contact the Staff Duty Office through the operator at DSN 793--6001, Commercial (309) 782--6001. The following rules and regulations are available from ACALA, ATTN: AMSMC--SFS, Rock Island, IL 61299--7630. Copies may be requested, or further information obtained by contacting the ACALA Radiation Protection Office (RPO). (1) Title 10 CFR Part 19 -- Notices, Instructions, and Reports to Workers. (2) Title 10 CFR Part 20 -- Standards for Protection Against Radiation. (3) Title 10 CFR Part 21 -- Reporting of Defects and Noncompliance. (4) NRC License, License Conditions, and License Application.

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7. Safety, Care, and Handling:

WARNINGNuclear, Biological, and Chemical (NBC) agents can kill you. If NBC exposure is suspected, all air filter media must be handled by personnel wearing full NBC protective equipment (FM 21--11).

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WARNING

RADIATION HAZARDFire control instruments containing Tritium are used as a part of a backup system for manual firing. Loss of illumination may indicate that leakage has occurred. Do not attempt to repair a non--illuminated device. Pre--Maintenance Check: a. Prior to taking any maintenance action on fire control devices (e.g., purging or charging M1A1 Collimator), check for broken/cracked reticle or loss of illumination as follows: (1) Place device in the dark for at least four hours to prevent exterior light from activating the phosphor. (2) Check for cracks/illumination in a low light environment after allowing sufficient time to accustom eyes to the dark. b. If illumination is not observed, or illuminated but cracks are observed, take following actions: (1) Personnel handling the tritrium device should wear rubber or latex gloves (item 17, Appendix D). (2) Seal entire device in two plastic bags (item 5, Appendix D). (3) Mark the outer bag as Broken tritium device -- do not open. (4) Dispose of used gloves as radioactive waste, per instructions from local Radiation Safety Officer (RSO). Wash well with nonabrasive soap and water. c. If illumination is observed, maintenance actions may proceed.

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WARNINGCARBON MONOXIDE POISONING CAN BE DEADLY Carbon monoxide is a colorless, odorless, deadly poisonous gas which, when breathed, deprives the body of oxygen and causes suffocation. Exposure to air contaminated with carbon monoxide produces symptoms of nausea, headache, dizziness, apparent drowsiness, loss of muscular control, and coma. Permanent brain damage or death can result from severe exposure. Carbon monoxide occurs in the exhaust fumes of fuel--burning heaters and internal--combustion engines and from firing the main armament. It becomes dangerously concentrated under conditions of inadequate ventilation. The following precautions must be observed to ensure the safety of personnel whenever the personnel heater, main or auxiliary engine of any vehicle is operated for maintenance purposes or tactical use, or when firing the main armament. 1. DO NOT operate heater or engine of vehicle in an enclosed area unless it is ADEQUATELY VENTILATED. 2. DO NOT idle engine for long periods without maintaining adequate ventilation in personnel compartments. 3. DO NOT drive any vehicle with inspection plates, cover plates, or engine compartment doors removed unless necessary for maintenance purposes. 4. BE ALERT at all times during vehicle operation for exhaust odors and exposure symptoms. If either are present, immediately ventilate personnel compartments. If symptoms persist, remove affected personnel from vehicle and treat as follows: expose to fresh air; keep warm; do not permit physical exercise; if necessary, administer artificial respiration. 5. Assure that LEAD FILTER switch is set at INTAKE during all firings and VENT DUCT CONTROL HANDLE is in the UP position (para 2--22.2a). THE BEST DEFENSE AGAINST CARBON MONOXIDE POISONING IS ADEQUATE VENTILATION

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WARNING

DO NOT chamber ammunition until immediately before firing. Ammunition left too long in a hot weapon may result in hazardous conditions. Fire or remove ammunition within 5 minutes of chambering. For each new issue, overhauled, inspected or repaired cannon or mount received, fire first round using 50--ft lanyard. The firing of a field artillery round without a fuze or with an unauthorized fuze is strictly prohibited. Only authorized fuzes will be used with the authorized projectiles and propelling charges, or an in--bore premature explosion will result. Do not fire charges 1 and 2, Green Bag, M3A1. The fire control solution to fire these charges in the M109A6 Howitzer is not available. Keep all propelling charges containerized until the breech is opened from the previous round. Unused powder increments will be placed back into powder container on the howitzer until time permits burning. Severe burns to personnel may result from accidental ignition of excess powder increments. Do not stand directly behind the breech opening while loading. Refer to TM 9--1300--206, Ammunition and Explosives Standards, for correct procedures for storing and handling ammunition. High intensity noise hearing protection required. Decibel levels of engine during operation exceed safe levels for human hearing. Failure to wear hearing protection could result in hearing impairment. Personnel hearing can be PERMANENTLY DAMAGED if exposed to constant high noise levels of 85 dB (A) or greater. Wear approved hearing protection devices when working in high noise level areas. Personnel exposed to high noise levels shall participate in a hearing conversation program in accordance with TB MED 501. Hearing loss occurs gradually but becomes permanent over time. Use care when manually unlocking travel lock. If jaw is not fully unclamped, crowbar will snap back. Injury to personnel could result. Do not open doors in an NBC environment. LEAD filter shall be used during Fire Missions and during suspected NBC environment, to prevent exposure to carbon monoxide gas. If NBC exposure is suspected, all air filter media will be handled by personnel wearing full NBC protective equipment. Consult your unit NBC officer or NBC NCO for appropriate handling or disposition instructions. Remain at least 2 feet from radiating antennas of vehicle mounted radios. Antennas can radiate harmful levels of radio frequency.

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WARNING To avoid danger of electrical shock and damage to equipment, ensure that both radio antennas are tied down before driving under overhead power lines. Be familiar with all drivers controls. The two--stage accelerator is provided to compensate for variations in drivers seat height and in drivers physical characteristics. DO NOT mistake raised portion of accelerator for a brake. Death or injury could result from failure to heed this warning. When backing the vehicle for emplacement or any other reason, two personnel must guide the driver. Battery BA--l576/U used in night viewer may explode if overheated. Do not operate night viewer on the battery when the power cable is attached. This may cause the battery to overheat. Do not store night viewer with battery installed. Phosphorus material on inside of night viewer is toxic if tube is broken. Be careful not to inhale or allow contact with open skin wounds or with mouth. Do not remove radiator cap while engine is hot. Hot coolant can cause severe injury. Dry--cleaning solvent P--D--680 is toxic and flammable. To avoid injury, wear protective goggles and gloves and use in a well--ventilated area. Avoid contact with skin, eyes, and clothes. Do not breathe vapors. Do not use near open fire or excessive heat. Do not smoke when using solvent. Failure to do so could cause SERIOUS INJURY. If you become dizzy while using dry--cleaning solvent, get fresh air immediately, and if necessary, get medical attention. If contact with skin or clothes is made, flush thoroughly with water. If the solvent contacts your eyes, wash them with water immediately and obtain medical aid (FM 21--11). During training and in combat (situation permitting) hatches and doors should be opened and personnel should exit the vehicle when CO2 discharges. Headache, dizziness and performance degradation may occur in the presence of CO2. CO2 is a toxicant and an asphyxiant. Do not inhale discharged CO2. Ventilate area if CO2 is discharged.

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TM 9-2350-314-10

WARNING

Corrosion inhibitor contains alkali. Do not get in eyes; wear goggles/safety glasses when using. Avoid contact with skin. In case of contact, immediately wash area with soap and water. If eyes are contacted, flush eyes with large amounts of water for at least 15 minutes and get immediate medical attention. Refer to FM 21--11, First Aid for Soldiers, for correct procedures to be taken if a crewmember is injured. Diesel fuel is flammable. DO NOT smoke within 50 feet of the vehicle while refueling. Do not place flammables or explosives on or near personnel heater to prevent injury to personnel and damage to equipment. Do not block or restrict the heater vent. Shut off engine prior to opening the engine doors, unless specified otherwise. Failure to do this may result in personnel injury due to possibility of personnel being struck by moving components. A protective fan screen must be installed prior to doing maintenance in the engine compartment when engine is running or when running engine in ground hop mode. High air flow can suck hands into fan impeller.

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TM 9-2350-314-10

WARNINGLead Particulate and Fumes Hazard The adverse effects associated with exposure of lead range from acute to relatively mild. The symptoms of severe lead intoxication include loss of appetite, metallic taste, constipation, nausea, pallor, excessive tiredness, weakness, insomnia, headache, nervous irritability, muscle and joint pains, fine tremors, numbness, dizziness, hyperactivity, and colic. Inorganic lead absorption can occur from inhaling finely divided particles of metallic or soluble lead compounds. Lead is released as a result of firing artillery weapons because propelling charges normally contain lead foil as a decoppering agent that removes rotating band residue from the weapon bore. The lead is vaporized as the charge burns and is either swept through the tube and out the muzzle or settles in the crew compartment. The following precautions must be observed to ensure safety of personnel during routine and combat conditions. BE ALERT during all firing missions for exposure symptoms. If symptoms of lead intoxication are suspected, IMMEDIATELY ventilate vehicle. If symptoms persist, remove affected personnel from vehicle and treat as follows: Expose to fresh air, keep warm, do not permit physical exercise. (Consult FM 21--11, First Aid for Soldiers, for additional instruction.) A physician should be consulted within 24 hours.

WARNING

Individual exposure shall be limited to a maximum firing dosage of 13 M119 charges or six M203 charges per 24 hour period. If firing dosage will exceed these limits, MCS operation with the M25A1 face mask is required.

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WARNING

The howitzer bustle overhang and low rear door/slip ring present a head injury hazard. This hazard can be reduced by wearing a CVC or kevlar helmet when working around the vehicle. The driver must not protrude any part of his body out of the open drivers hatch while the cab is being traversed. The COS shall notify the driver and receive positive verbal acknowledgement from the driver prior to traversing the cab. Failure to do this may result in possible injury/death to the driver. When traversing cab at high elevations beyond 45 degrees traverse limit, make sure that personnel in the area of the projectile racks are not struck by the rammer. Failure to do this may result in personnel injury--impact/crushing or equipment damage due to rammer striking personnel or projectile rack. Limit crew exposure to vehicle vibration to 5.4 hours per 24 hour period. Prolonged exposure to vehicle vibration can result in permanent physical damage to the crew. Crewmembers must wear properly sized and maintained DH--132 helmets (single hearing protection) when engine is on and training more than 46 km in 24 hour period. Ear plugs and DH--132 helmet must be worn if more than 46 km in 24 hour period. All personnel within 6 meters of an operating M109A6 must wear single hearing protection. Failure to do this may result in personnel injury--hearing damage due to exposure to high noise levels. The COS and other personnel within 66 feet to either side of the machine gun and 27 feet behind the machine gun must wear approved and properly fitted single hearing protective devices (e.g. DH--132 helmet) when the machine gun is being fired. Failure to do this may result in personnel injury--auditory damage.

WARNING

When servicing this vehicle, performing maintenance, or disposing of materials such as engine coolant, transmission fluid, lubricants, battery acids or batteries, and CARC paint, consult your unit/local regulatory guidance. If further information is needed please contact the U.S. Army Environmental Hotline at 1--800--872--3845.

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TM 9-2350-314-10

WARNING

When hooking or unhooking towbar from a disabled vehicle, set parking brake or chock tracks of disabled vehicle before hooking or unhooking towbar. If towed vehicle is not chocked, or parking brake not set, disabled vehicle may move, causing injury or death to personnel and/or damage to equipment.

WARNINGPersonnel in howitzer and ammunition resupply vehicle must wear properly fitting single (e.g. DH--132 helmet, ear plugs, etc.) or double (DH--132 helmet and ear plugs etc.) hearing protection. Personnel located within 630 meters of the howitzer must wear properly fitted single hearing protection during firing. Daily firing dosage per individual must be limited to 1000 points IAW the point value system listed in the following tables. Failure to do this may result in personnel injury--auditory damage due to lack of or inadequate hearing protection. Table I. Points per Round for Various Propelling Charges and Hatch Configurations if the Driver is in the Drivers Compartment Propelling Charge Hearing Protection Single Hatch Configuration All Closed Rear & Side Open Only Rear Open Double All Closed Rear & Side Open Only Rear Open M203 6 P P 1 P P M119 57 P 65 3 P 4 M4A2 8 8 8 1 1 1 M3A1 4 4 4 1 1 1

P = Prohibited Note: To be used in calculating recommended maximum number of rounds fired for crewmembers inside the M109A6.

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TM 9-2350-314-10 Table II. Points per Round for Various Propelling Charges and Hatch Configurations if the Driver is not in the Drivers Compartment Propelling Charge Hearing Protection Single Hatch Configuration All Closed Rear & Side Open Only Rear Open Double All Closed Rear & Side Open Only Rear Open M203 6 P P 1 P P M119 1 P 14 1 P 1 M4A2 6 6 6 1 1 1 M3A1 1 1 1 1 1 1

P = Prohibited Note: To be used in calculating recommended maximum number of rounds fired for crewmembers inside the M109A6. Table III. Points per Round for Various Propelling Charges with the Driver Removed from the Ammunition Resupply Vehicle Propelling Charge Hearing Protection Single Hatch Configuration Closed Open M548 Double Closed Open M548 *= No data available to determine points per round. NOTES: 1. To be used in calculating recommended maximum number of rounds fired for crewmembers in the ammunition area of the ammunition resupply vehicle. 2 Points shown are for all ammuniton resupply vehicle personnel when resupply vehicle is less than 45 feet (14 meters) from a firing howitzer. Change 3 k M203 1 164 82 1 9 5 M119 1 59 * 1 3 * M4A2 1 42 * 1 3 * M3A1 1 1 * 1 1 *

TM 9-2350-314-10 Table IV. Points per Round for MACS Propelling Charges and Hatch Configurations if the Driver is in the Drivers Compartment. Hearing Protection Single g Hatch All Closed Rear & Side Open Only Rear Open All Closed Double Rear & Side Open Only Rear Open M232 Chg 5 H5 8 P P 1 P P M232 Chg 4 H4 8 P P 1 P 30 M232 Chg 3 H3 4 P P 1 14 14 M231 Chg 2 L2 1 1 1 1 1 1 M231 Chg 1 L1 1 1 1 1 1 1

Table V. Points per Round for MACS Propelling Charges and Hatch Configurations if the Driver is NOT in the Drivers Compartment. Hearing Protection Single g Hatch All Closed Rear & Side Open Only Rear Open All Closed Double Rear & Side Open Only Rear Open M232 Chg 5 H5 8 P P 1 P P M232 Chg 4 H4 8 P 83 1 P 6 M232 Chg 3 H3 1 71 71 1 4 4 M231 Chg 2 L2 1 1 1 1 1 1 M231 Chg 1 L1 1 1 1 1 1 1

Table VI. Points per Round for MACS Propelling Charges with the Driver Removed from the M992A2 Ammunition Resupply Vehicle. Hearing Protection Single Double Closed Open Closed Open Hatch M232 Chg 5 H5 P P P 40 M232 Chg 4 H4 P P P 38 M232 Chg 3 H3 P P 26 24 M231 Chg 2 L2 6 1 1 1 M231 Chg 1 L1 1 1 1 1

WARNING

All personnel located outside the vehicle must be clear of hull and drivers hatch must be closed while cab is being traversed. Radiation Hazard Tritium Gas (H3) The M140 alignment device is radioactively illuminated. Check for presence of illumination in a low light environment. If illumination is not present, notify local radiological protection officer. Do not attempt to repair.

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WARNING

When operating the PLGR on external power with BA--5800 lithium battery installed, the battery may explode. Ensure battery is removed before connecting power cable to prevent serious injury or death. The crew compartment must be adequately ventilated during all firing using the LEAD FILTER or ventilation system in accordance with para 2--22.2. Ensure that correct propellant temperature and shell weights are entered in PDFCS. Failure to comply will result in incorrect ballistic computations. This could cause injury or death to friendly troops. Radiation Hazard Tritium Gas (H3) The M1A1 collimator is radioactively illuminated and should be checked before using for illumination in low--light environment. If no illumination occurs, notify local radiological protection officer. Do not attempt to repair. Site to Crest information must be entered in AFCS/PDFCS or transmitted to POC/BCS/FDC. Failure to enter or send this information will result in an incorrect ballistic computation. This could cause injury or death to friendly troops. Direct fire on targets located closer than 800 meters from howitzer will be fired on during combat situations only. Lethal fragments can travel up to 600 meters from point of burst. ----Do not load more than two increments of M231. Do not use Charge 1 or 2 green bags, M3A1. Do not use Charge 1 or 2. When authorized rates of fire for howitzer are exceeded, propelling charge cook--offs may occur within 1 minute after chambering. If firing in hot tube status, propelling charge cook--off may occur within 1 minute after chambering. AFCS/PDFCS/TTS will indicate hot, warm, or cold tube. If TTS is operational, use temperature readout to determine tube condition and safe time in tube.

Electrical power shall be removed (off) before disconnecting or connecting electrical connectors or removing or installing units or components. Inadvertent contact with voltages present may be fatal. Connector pins may be damaged by arcing.

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WARNINGW1 Keep weapon trained on target. Evacuate all personnel except COS and No. 1 cannoneer. W2 Stay clear of recoiling parts and dont put hand behind primer vent. W3 The primer can be expelled rearward should there be a sticker. W4 Never fire a projectile or charge that has been allowed to cool in a heated tube. Separate them and mark both unserviceable. This selection will be used by Unit maintenance personnel to input correction to NAV SUBSYSTEM boresight. Entry of improper data into boresight angle could result in injury to personnel down range.

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CHANGE NO. 4

TM 9-2350-314-10 C4 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, D.C., 15 JULY 2005

OPERATORS MANUAL FOR HOWITZER, MEDIUM, SELF-PROPELLED: 155MM M109A6 (NSN 2350-01-305-0028) (EIC: 3FC)TM 9-2350-314-10, 8 February 1999, is changed as follows: 1. The purpose of this change is to update TM 9-2350-314-10. 2. New or changed material is indicated by a vertical bar in the outside margin of text changes and by a hand symbol beside illustration changes. 3. Remove the old page and insert the new page as indicated below: Remove Pages m and n A through D i through (v blank)/1-0 1-5 through 1-8 None None None None None None Index-1 and Index-2 None Measurement page/Back cover (PIN) 4. File this change in front of the publication. Insert Pages m and n A through D i through 1-0 1-5 through 1-8 F.1-1 through F.1-30 G.2-1 through G.2-7/(G.2-8 blank) G.3-1 through G.3-7/(G.3-8 blank) J.1-1 through J.1-8 L-1 through L-209/(L-210 blank) M-1 through M-209/(M-210 blank) Index-1 and Index-2 Index-15 through Index-19/(Index-20 blank) Measurement page/Back cover (PIN)


By Order of the Secretary of the Army: PETER J. SCHOOMAKER General, United States Army Chief of Staff

Official: SANDRA R. RILEY Administrative Assistant to the Secretary of the Army 0506705

DISTRIBUTION: To be distributed in accordance with the Initial Distribution Number (IDN) 371931, requirements for TM 9-2350-314-10.

CHANGE NO. 3

TM 9-2350-314-10 C3 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, D.C., 30 SEPTEMBER, 2004

OPERATORS MANUAL FOR HOWITZER, MEDIUM, SELF-PROPELLED: 155MM M109A6 (NSN 2350-01-305-0028) (EIC: 3FC)TM 9-2350-314-10, February 1999, is changed as follows: 1. The purpose of this change is to update TM 9-2350-314-10. 2. New or changed material is indicated by a vertical bar in the outside margin of text changes and by a hand symbol beside illustration changes. 3. Remove the old page and insert the new page as indicated below: Remove Pages k and l none A through D i and ii 1-1 through 1-8 1-11 through 1-14 1-17 and 1-18 none 1-19 and 1-20 1-25 and 1-26 none 1-39 and 1-40 none 2-15 and 2-16 2-27 and 2-28 none 2-29 and 2-30 2-37 through 2-40 2-47 and 2-48 2-67 and 2-68 2-123 and 2-124 2-129 and 2-130 2-133 and 2-134 2-181 and 2-182 Insert Pages k and l m and n A through D i and ii 1-1 through 1-8 1-11 through 1-14 1-17 and 1-18 1-18.1 and 1-18.2 1-19 and 1-20 1-25 and 1-26 1-38.1 and 1-38.2 1-39 and 1-40 2-8.1 and 2-8.2 2-15 and 2-16 2-27 and 2-28 2-28.1 and 28.2 2-29 and 2-30 2-37 through 2-40 2-47 and 2-48 2-67 and 2-68 2-123 and 2-124 2-129 and 2-130 2-133 and 2-134 2-181 and 2-182


TM 9-2350-314-10 none 2-259 through 2-262 2-265 through 2-268 2-293 through 2-298 2-300.1/(2-300.2 blank) 2-303 through 2-308 2-316.3 and 2-316.4 2-317and 2-318 2-321 through 2-324 2-331 and 2-332 2-335 and 2-336 3-1 and 3-2 none 3-39 and 3-40 none 3-3-41 and 3-42 none 3-61 and 3-62 3-67 and 3-68 3-77 through 3-84 3-91 and 3-92 3-95 and 3-96 3-129 through 3-134 3-157 through 3-162 5-21 through 5-26.2/(5-26.2 blank) 5-57 and 5-58 A-1 and A-2 B-1 and B-2 B-13 and B14 D-1 through D-5/(D-6 blank) E-3 and E-4 E-11 and E-12 F-1 through F-6 F-9 through F-18 F-23 through F-26 F-29 through F-31/(F-32 blank) none I-3 and I-4 I-19 and I-20 J-1 and J-2 none Index-1 through Index-13/(Index-14 blank) Measurement page/Back cover (PIN) Front Cover/Blank 4. File this change in front of the publication. 2-258.1 through 2-258.143/ (2-258.144 blank) 2-259 through 2-262 2-265 through 2-268 2-293 through 2-298 2-300.1/(2-300.2 blank) 2-303 through 2-308 2-316.3 through 2-316.9/ (2-316.10 blank) 2-317 and 2-318 2-321 through 2-324 2-331 and 2-332 2-335 and 2-336 3-1 and 3-2 3-38.1 through 3-38.34 3-39 and 3-40 3-40.1 and 3-40.2 3-41/(3-42 blank) 3-50.3 through 3-50.12 3-61 and 3-62 3-67 and 3-68 3-77 through 3-84 3-91 and 3-92 3-95 and 3-96 3-129 through 3-134 3-157 through 3-162 5-21 through 5-26.2/(5-26.2 blank) 5-57 and 5-58 A-1 and A-2 B-1 and B-2 B-13 and b14 D-1 through D-5/(D-6 blank) E-3 and E-4 E-11 and E-12 F-1 through F-6 F-9 through F-18 F-23 through F-26 F-29 through F-31/(F-32 blank) G.1-1 through G.1-7/(G.1-8 blank) I-3 and I-4 I-19 and I-20 J-1 and J-2 K.1-1 through K.1-7/(k.1-8 blank) Index-1 through Index-14 Measurement page/Back cover (PIN) Front Cover/Blank

By Order of the Secretary of the Army:

Official: JOEL B. HUDSON Administrative Assistant to the Secretary of the Army0420302

PETER J. SCHOOMAKER General, United States Army Chief of Staff

DISTRIBUTION: To be distributed in accordance with the Initial Distribution Number (IDN) 371238, requirements for TM 9-2350-314-10

CHANGE NO.2

TM 9-2350-314-10 C2 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, D.C., 15 JANUARY, 2002 OPERATORS MANUAL FOR HOWITZER, MEDIUM, SELF-PROPELLED: 155MM M109A6 (NSN 2350- -305-01-0028) (EIC: 3FC)

TM 9--2350--314--10, February 1999, is changed as follows: 1. The purpose of this change is to update TM 9--2350--314--10. 2. New or changed material is indicated by a vertical bar in the outside margin of text changes and by a hand symbol beside illustration changes. 3. Remove the old page and insert the new page as indicated below: Remove Pages a through d k/(l blank) A through C/(D blank) 1--0 1--1 through 1--6 1--11 and 1--12 1--15 and 1--16 1--21 and 1--22 1--25 and 1--26 2--19 through 2--24 2--35 and 2--36 2--39 and 2--40 2--47 through 2--50 2--54.1/(2--54.2 blank) None 2--63 and 2--64 2--69 and 2--70 2--103 through 2--106 2--117 and 2--118 2--129 and 2--130 2--133 and 2--134 2--137 and 2--138 2--143 through 2--146 2--157 and 2--158 2--179 through 2--182 2--209 through 2--212 2--229 and 2--230 2--245 and 2--246 2--251 and 2--252 2--265 through 2--276 2--279 and 2--280 2--285 and 2--286 Insert Pages a through d k and l A through C/(D blank) (v blank)/1--0 1--1 through 1--6 1--11 and 1--12 1--15 and 1--16 1--21 and 1--22 1--25 and 1--26 2--19 through 2--24 2--35 and 2--36 2--39 and 2--40 2--47 through 2--50 2--54.1 and 2--54.2 2--62.1 and 2--62.2 2--63 and 2--64 2--69 and 2--70 2--103 through 2--106 2--117 and 2--118 2--129 and 2--130 2--133 and 2--134 2--137 and 2--138 2--143 through 2--146 2--157 and 2--158 2--179 through 2--182 2--209 through 2--212 2--229 and 2--230 2--245 and 2--246 2--251 and 2--252 2--265 through 2--276 2--279 and 2--280 2--285 and 2--286


None 2--287 through 2--292 None 2--303 and 2--304 2--311 through 2--314 2--325 through 2--328 3--33 and 3--34 3--51 through 3--56 3--69 and 3--70 3--81 and 3--82 3--87 through 3--90 3--93 through 3--96 3--137 and 3--138 3--161 and 3--162 5--5 and 5--6 5--21 through 5--24 5--29 and 5--30 None 5--33 and 5--34 None 5--35 through 5--36.2 None 5--37 through 5--40 5--45 and 5--46 5--53 through 5--56 None 5--57 through 5--60 5--67 through 5--70.2 A--1 through A--3/(A--4 blank) B--1 and B--2 B--5 through B--8 D--3 through D--5/(D--6 blank) E--3 through E--8 E--11 and E--12 None E--13 and E--14 H--1 and H--2 I--1 through I--4 I--15 through I--22 I--31 and I--32 I--35 and I--36 Index--3 through Index 12 4. File this change in front of the publication.

2--286.1/(2--286.2 blank) 2--287 through 2--292 2--302.1/(2--302.2 blank) 2--303 and 2--304 2--311 through 2--314 2--325 through 2--328 3--33 and 3--34 3--51 through 3--56 3--69 and 3--70 3--81 and 3--82 3--87 through 3--90 3--93 through 3--96 3--137 and 3--138 3--161 and 3--162 5--5 and 5--6 5--21 through 5--24 5--29 and 5--30 5--30.1/(5--30.2 blank) 5--33 and 5--34 5--34.1/(5--34.2 blank) 5--35 through 5--36.2 5--36.3/(5--36.4 blank) 5--37 through 5--40 5--45 and 5--46 5--53 through 5--56 5--56.1 through 5--56.4 5--57 through 5--60 5--67 through 5--70.2 A--1 through A--3/(A--4 blank) B--1 and B--2 B--5 through B--8 D--3 through D--5/(D--6 blank) E--3 through E--8 E--11 and E--12 E--12.1/(E--12.2 blank) E--13 and E--14 H--1 and H--2 I--1 through I--4 I--15 through I--22 I--31 and I--32 I--35 and I--36 Index--3 through Index--12


Official:

ERIC K. SHINSEKI General, United States Army Chief of Staff

JOEL B. HUDSON Administrative Assistant to the Secretary of the Army 0133203

DISTRIBUTION: To be distributed in accordance with IDN 371931 requirements for TM 9--2350--314--10.

TM 9-2350-314- -2-20- -2

C-6

CHANGE NO.1

TM 9-2350-314-10 C1 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, D.C., 1 APRIL 2001

OPERATORS MANUAL FOR HOWITZER, MEDIUM, SELF-PROPELLED: 155MM M109A6 (NSN 2350- -305-01-0028) (EIC: 3FC)TM 9--2350--314--10, February 1999, is changed as follows: 1. The purpose of this change is to update TM 9--2350--314--10. 2. New or changed material is indicated by a vertical bar in the outside margin of text changes and by a hand symbol beside illustration changes. 3. Remove the old page and insert the new page as indicated below: Remove Pages c through f i and j none i and ii 1--1 and 1--2 1--7 and 1--8 1--21 and 1--22 1--35 and 1--36 2--5 and 2--6 2--11 and 2--12 2--19 through 2--32 2--35 through 2--38 2--45 through 2--56 2--61 through 2--68 2--75 through 2--86 2--89 through 2--92 2--113 and 2--114 2--131 and 2--132 2--137 through 2--148 2--151 through 2--200 2--203 through 2--258 2--283 and 2--284 2--293 and 2--294 Insert Pages c through f i and j A through C/(D blank) i and ii 1--1 and 1--2 1--7 and 1--8 1--21 and 1--22 1--35 and 1--36 2--5 and 2--6 2--11 and 2--12 2--19 through 2--32 2--35 through 2--38 2--45 through 2--56 2--61 through 2--68 2--74.1 through 2--86 2--89 through 2--92 2--113 and 2--114 2--131 and 2--132 2--137 through 2--148 2--151 through 2--200 2--203 through 2--258 2--283 and 2--284 2--293 and 2--294


TM 9-2350-314-10

Remove Pages 2--297 through 2--304 2--309 through 2--316 2--325 through 2--332 2--337 and 2--338 3--3 through 3--10 3--17 through 3--22 3--25 through 3--40 3--43 through 3--48 3--51 and 3--52 3--59 through 3--62 3--77 and 3--78 3--81 and 3--82 3--85 and 3--86 3--95 through 3--102 3--115 and 3--116 3--133 through 3--138 3--159 and 3--160 5--1 through 5--10 5--21 through 5--30 5--33 through 5--38 5--45 and 5--46 5--51 and 5--52 5--57 through 5--70 A--1 and A--2 B--3 through B--6 B--13 and B--14 D--3 and D--4 E--3 and E--4 F--1 through F--6 F--9 and F--10 F--13 and F--14 F--19 and F--20 F--23 and F--24 F--27 and F--28 G--1 and G--2 H--1 and H--2 I--1 through I--8 I--11 through I--16

Insert Pages 2--297 through 2--304 2--309 through 2--316.4 2--325 through 2--332 2--337 and 2--338 3--3 through 3--10 3--17 through 3--22 3--24.1 through 3--40 3--43 through 3--48 3--50.1 through 3--52 3--59 through 3--62.1/(3--62.2 blank) 3--77 and 3--78 3--81 and 3--82 3--85 and 3--86 3--95 through 3--102 3--115 and 3--116 3--133 through 3--138 3--159 and 3--160 5--1 through 5--10 5--21 through 5--30 5--33 through 5--38 5--45 and 5--46 5--51 and 5--52 5--57 through 5--70.2 A--1 through A--3/(A--4 blank) B--3 through B--6 B--13 and B--14 D--3 and D--4 E--3 and E--4 F--1 through F--6 F--9 and F--10 F--13 and F--14 F--19 and F--20 F--23 and F--24 F--27 and F--28 G--1 and G--2 H--1 and H--2 I--1 through I--8 I--11 through I--16

TM 9-2350-314-10

Remove Pages I--21 through I--24 J--1 through J--4 none Index--1 through Index--13/(Index--14 blank) DA2028--2 form -- sample DA2028--2 form (4 copies) Cover/ blank 4. File this change in front of the publication.

Insert Pages I--21 through I--24 J--1 through J--8 K--1 through K--9 (K--10 blank) Index--1 through Index--13/(Index--14 blank) DA2028--2 form -- sample DA2028--2 form (4 copies) Cover/ blank


Official:

ERIC K. SHINSEKI General, United States Army Chief of Staff

JOEL B. HUDSON Administrative Assistant to the Secretary of the Army 0009805

DISTRIBUTION: To be distributed in accordance with IDN 371931 requirements for TM 9235031410.

TM 9-2350-314-10

INSERT LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES

LIST OF EFFECTIVE PAGESNote: The portion of the text affected by the changes is indicated by a vertical line in the outer margin of the page. Changes to illustrations are indicated by miniature pointing hands. Changes to wiring diagrams are indicated by shaded areas.

Date of issue for original and changed pages are: Original .......... 0........................8 February, 1999 Change .......... 1........................... 1 April, 2001 Change .......... 2..................... 15 January 2002 Change .......... 3............... 30 September, 2004 Change .......... 4.............................15 July, 2005 TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 1658, CONSISTING OF THE FOLLOWING: Page *Change No. No. Cover ....................................... 3 Blank........................................ 1 Change 4 Errata Added (2) ...... 4 Change 3 Errata (4) ................. 3 Change 2 Errata (4) ................. 2 Change 1 Errata (4) ................. 1 a c ......................................... 2 d e ......................................... 1 f j ........................................... 0 k l .......................................... 3 m .............................................. 4 n Added ................................... 3 A D ........................................ 4 i ................................................ 4 ii ............................................... 4 iii............................................... 4 iv .............................................. 0 v .............................................. 4 1-0............................................ 4 1-1............................................ 0 1-2 1-4 .................................. 3 1-5 1-6 .................................. 4 1-7............................................ 4 1-8............................................ 3 1-9 10.................................... 0 1-11 1-13 .............................. 3 1-14.......................................... 0 1-15.......................................... 2 1-16 1-20 .............................. 0 1-17.......................................... 3 1-18.......................................... 0 18.1 18.2 Added ................... 3 1-19.......................................... 3 1-20.......................................... 0 1-21.......................................... 2 1-22 1-25 .............................. 0 Page *Change No. No. 1-26 ......................................... 3 1-27 1-35 .............................. 0 1-36 ......................................... 1 1-37 1-38 .............................. 0 1-38.1 1-38.2 Added............. 3 1-39 ......................................... 3 1-40 1-43 .............................. 0 1-44 Blank ............................... 0 2-1 2-4 .................................. 0 2-5 ........................................... 1 2-6 2-8 .................................. 0 2-8.1 2-8.2 ............................ 3 2-9 2-11 ................................ 0 2-12 ......................................... 1 2-13 2-15 .............................. 0 2-16 ......................................... 3 2-17 2-18 .............................. 0 2-19 ......................................... 2 2-21 2-23 .............................. 2 2-24 2-25 .............................. 1 2-26 ......................................... 0 2-27 ......................................... 1 2-28 ......................................... 3 2-28.1 2-28.2 Added............. 3 2-29 ......................................... 3 2-30 ......................................... 1 2-31 ......................................... 0 2-32 ......................................... 1 2-33 2-34 .............................. 0 2-35 ........................................ 2 2-36 2-37 .............................. 1 2-38 2-39 .............................. 3 2-40 ......................................... 2 2-47 2-48 .............................. 3 2-49 ......................................... 2 2-50 2-51 .............................. 1*Zero in this column indicates an original page

Page *Change No. No. 2-52 2-53 ...............................0 2-54 ..........................................1 2-54.1 .......................................2 2-54.2 .......................................2 2-55 2-56 ...............................1 2-57 ..........................................0 2-58 ..........................................2 2-59 2-61 ...............................0 2-62 ..........................................1 2-62.1 2-62.2 Added .............2 2-63 ..........................................2 2-64 2-65 ...............................0 2-66 ..........................................1 2-67 ..........................................3 2-68 ..........................................1 2-69 ..........................................2 2-70 2-74 Added ...................1 2-75 ..........................................1 2-76 2-77 ...............................0 2-78 ..........................................1 2-79 ..........................................0 2-80 2-82 ...............................1 2-83 ..........................................0 2-84 2-85 ...............................1 2-86 2-89 ...............................0 2-90 2-92 ...............................1 2-93 2-103 .............................0 2-104 2-105 ...........................2 2-106 2-113 ...........................0 2-114 ........................................1 2-115 2-117 ...........................0 2-118 ........................................2 2-119 2-122 ...........................0 2-123 2-124 ...........................3 2-125 2-128 ...........................0 2-129 ........................................3

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Page *Change No. No. 2-130........................................ 2 2-131........................................ 0 2-132........................................ 1 2-133........................................ 3 2-134........................................ 2 2-135 2-136 .......................... 0 2-137........................................ 2 2-138 2-139 .......................... 1 2-140........................................ 0 2-141........................................ 1 2-142........................................ 0 2-142.1 2-142.2 Added......... 1 2-143........................................ 1 2-144 2-145 .......................... 2 2-146 2-147 .......................... 1 2-148 2-150 .......................... 0 2-151 2-152 .......................... 1 2-152.1 Added ......................... 1 2-152.2 Blank........................... 1 2-153 2-154 .......................... 1 2-155........................................ 0 2-156 2-157 .......................... 1 2-158........................................ 2 2-158.1 2-158.3 Added......... 1 2-158.4 Blank........................... 1 2-159........................................ 0 2-160 2-162 .......................... 1 2-162.1 2-162.4 Added......... 1 2-163 2-164 .......................... 1 2-164.1 2-164.2 Added......... 1 2-165 2-168 .......................... 1 2-168.1 2-168.5 Added......... 1 2-168.6 Blank........................... 1 2-169 2-173 .......................... 1 2-174........................................ 0 2-175 2-178 .......................... 1 2-179........................................ 2 2-180 2-181 .......................... 1 2-182........................................ 3 2-183 2-185 .......................... 1 2-186........................................ 0 2-187 2-191 .......................... 1 2-192........................................ 0 2-193 2-200 .......................... 1 2-201 2-203 .......................... 0 2-204........................................ 1 2-205........................................ 0 2-206 2-208 .......................... 1 2-208.1 Added ......................... 1 2-208.2 Blank........................... 1 2-209........................................ 1 2-210 2-211 .......................... 2 2-212 2-218 .......................... 1 2-218.1 Added ......................... 1

Page *Change No. No. 2-218 Blank ............................. 1 2-219 2-224 .......................... 1 2-224.1 Added ......................... 1 2-224.2 Blank .......................... 1 2-225 Deleted .......................... 1 2-226 2-228 .......................... 1 2-229 2-230 .......................... 2 2-231 2-235 .......................... 1 2-236 2-237 .......................... 0 2-238 2-240 .......................... 1 2-241 ....................................... 0 2-242 2-244 .......................... 1 2-244.1 2-244.2 Added......... 1 2-245 ....................................... 2 2-246 ....................................... 1 2-247 ....................................... 1 2-248 2-249 .......................... 0 2-250 ....................................... 1 2-250.1 2-250.2 Added......... 1 2-251 2-252 .......................... 2 2-253 2-256 .......................... 1 2-257 ....................................... 0 2-258 ....................................... 1 2-258.1 2-258.143 Added..... 3 2-258.144 Blank ...................... 3 2-259 ....................................... 3 2-260 2-261 .......................... 0 2-262 ....................................... 3 2-263 2-264 .......................... 0 2-265 ....................................... 3 2-266 ....................................... 2 2-267 ....................................... 2 2-268 ....................................... 3 2-269 ....................................... 0 2-270 ....................................... 2 2-271 ....................................... 0 2-272 2-276 .......................... 2 2-277 2-278 .......................... 0 2-279 ....................................... 2 2-280 2-283 .......................... 0 2-284 ....................................... 1 2-285 ....................................... 0 2-286 ....................................... 2 2-286.1 Added ......................... 2 2-286.2 Blank .......................... 2 2-287 ....................................... 0 2-288 2-291 .......................... 2 2-292 ....................................... 0 2-293 2-297 .......................... 3 2-298 2-300 .......................... 1 2-300.1 .................................... 3 2-300.2 Blank .......................... 1 2-301 2-302 .......................... 1 2-302.1 Added ......................... 2*Zero in this column indicates an original page

Page *Change No. No. 2-302.2 Blank ...........................2 2-303 ........................................3 2-304 2-305 ...........................0 2-306 2-307 ...........................3 2-308 ........................................0 2-309 ........................................1 2-310 ........................................0 2-311 2-312 ...........................2 2-312.1 2-312.2 Added .........1 2-313 2-314 ...........................2 2-315 2-316 ...........................1 2-316.1 2-316.2 Added .........1 2-316.3 .....................................1 2-316.4 .....................................3 2-316.5 2-316.9 Added .........3 2-316.10 Blank .........................3 2-317 ........................................3 2-318 2-321 ...........................0 2-322 2-323 ...........................3 2-324 2-325 ...........................0 2-326 2-327 ...........................2 2-328 2-331 ...........................1 2-332 ........................................3 2-333 2-335 ...........................0 2-336 ........................................3 2-337 ........................................1 2-338 2-343 ...........................0 2-344 Blank ..............................0 3-1 3-2 ...................................3 3-3 3-8 ...................................1 3-9 3-10 .................................1 3-11 3-17 ...............................0 3-18 3-19 ...............................1 3-20 3-21 ...............................0 3-22 ..........................................1 3-23 3-24 ...............................0 3-24.1 3-24.2 Added .............1 3-25 3-27 ...............................1 3-28 ..........................................0 3-29 3-32 ...............................1 3-33 ..........................................2 3-34 3-35 ...............................1 3-36 3-37 ...............................0 3-38 ..........................................1 3-38.1 3-38.34 Added ...........3 3-39 ..........................................3 3-40 ..........................................1 3-40.1 3-40.2 Added .............3 3-41 ..........................................3 3-42 Blank ................................3 3-43 ..........................................1 3-44 ..........................................0 3-45 3-48 ...............................1 3-49 3-50 ...............................0

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Page *Change No. No. 3-50.1 3-50.2 ........................ 1 3-50.3 3-50.12 Added........... 3 3-51.......................................... 1 3-52 3-55 .............................. 2 3-56 3-58 .............................. 0 3-59.......................................... 1 3-60.......................................... 0 3-61 3-62 .............................. 3 3-62.1 Added ........................... 1 3-62.2 Blank............................. 1 3-63 3-66 .............................. 0 3-67 3-68 .............................. 3 3-69.......................................... 0 3-70.......................................... 2 3-71 3-76 .............................. 0 3-77 3-83 .............................. 3 3-84.......................................... 0 3-85.......................................... 1 3-86.......................................... 0 3-87 3-89 .............................. 2 3-90.......................................... 0 3-91.......................................... 3 3-92.......................................... 0 3-94.......................................... 2 3-95.......................................... 3 3-96.......................................... 0 3-97 3-101 ............................ 1 3-102 3-115 .......................... 0 3-116........................................ 1 3-117 3-128 .......................... 0 3-129 3-133 .......................... 3 3-134 3-136 .......................... 1 3-137........................................ 2 3-138 3-156 .......................... 0 3-157 3-162 .......................... 3 4-1 4-6 .................................. 0 5-1............................................ 0 5-2 5-4 .................................. 1 5-5 5-6 .................................. 2 5-7 5-10 ................................ 1 5-11 5-20 .............................. 0 5-21 5-24 .............................. 3 5-25.......................................... 1 5-26.......................................... 3 5-26.1 Added ........................... 3 5-26.2 Blank............................. 3 5-27.......................................... 0 5-28.......................................... 1 5-29 5-30 .............................. 2 5-30.1 Added ........................... 2 5-30.2 Blank............................. 2 531 5-32................................ 0 5-33.......................................... 1 5-34.......................................... 2

Page *Change No. No. 5-34.1 Added ........................... 2 5-34.2 Blank ............................ 2 5-35 5-36 .............................. 2 5-36.1 5-36.2 ........................ 2 5-36.3 Added ........................... 2 5-5-36.4 Blank ......................... 2 5-37 5-40 .............................. 2 5-41 5-44 .............................. 0 5-45 ......................................... 2 5-46 5-51 .............................. 0 5-52 ......................................... 1 5-53 ......................................... 0 5-54 5-56 .............................. 2 5-56.1 5-56.4 Added............. 2 5-57 ......................................... 2 5-58 ......................................... 3 5-59 ......................................... 2 5-60 ......................................... 1 5-61 ......................................... 0 5-62 ......................................... 1 5-63 ......................................... 0 5-64 5-65 .............................. 1 5-66 ......................................... 0 5-67 ......................................... 2 5-68 ......................................... 1 5-69 5-70 .............................. 2 5-70.1 ...................................... 2 5-70.2 Aadded ......................... 1 5-71 5-86 .............................. 0 6-1 6-23 ................................ 0 6-24 Blank ............................... 0 A-1 ........................................... 3 A-2 A-3 ................................. 2 A-4 Blank ................................. 1 B-1 ........................................... 0 B-2 ........................................... 3 B-3 ........................................... 0 B-4 B-5 ................................. 1 B-6 ........................................... 2 B-7 ........................................... 0 B-8 ........................................... 2 B-9 B-13 ............................... 0 B-14 ......................................... 3 B-15 B-16 ............................. 0 C-1 C-8 ................................. 0 D-1 ........................................... 0 D-2 ........................................... 3 D-3 ........................................... 3 D-4 ........................................... 2 D-5 ........................................... 3 D-6 Blank................................. 0 E-1 E-3 ................................. 0 E-4 ........................................... 3 E-5 ........................................... 2*Zero in this column indicates an original page

Page *Change No. No. E-6 E-7 ..................................0 E-8............................................2 E-9 E-11 ................................0 E-12..........................................3 E-12.1 Added ...........................2 E-12.2 Blank.............................2 E-13..........................................2 E-14 E-17 ..............................0 E-18 Blank................................0 F-1 F-4...................................3 F-5 ............................................1 F-6 ............................................3 F-7 F-8...................................0 F-9 ............................................3 F-10 ..........................................1 F-11 ..........................................3 F-12 ..........................................0 F-13 ..........................................3 F-14 ..........................................3 F-15 ..........................................3 F-16 ..........................................0 F-17 ..........................................0 F-18 ..........................................3 F-19 ..........................................1 F-20 F-22...............................0 F-23 F-24...............................3 F-25 ..........................................3 F-26 ..........................................0 F-27 ..........................................0 F-28 ..........................................1 F-29 ..........................................0 F-30 F-31...............................3 F-32 Blank ................................0 F.1-1 F.1-30 Added ...............4 G-1 ...........................................1 G-2 G-7 .................................0 G-8 Blank .................................0 G.1-1 G.1-7 Added................3 G.1-8 Blank ..............................3 G.2-1 G.2-6 Added................4 G.2-7 Added .............................4 G.2-8 Blank Added ...................4 G.3-1 G.3-6 Added................4 G.3-7 Added .............................4 G.3-8 Blank Added ...................4 H-1............................................2 H-2............................................0 I-1 .............................................0 I-2 .............................................2 I-3 .............................................3 I-4 .............................................0 I-5 I-7 .....................................1 I-8 I-10 ...................................0 I-11 ...........................................1

Change 4

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Page *Change No. No. I-12 I-13 ................................ 0 I-14 I-15 ................................ 1 I-16 I-17 ................................ 2 I-18........................................... 0 I-19........................................... 2 I-20........................................... 3 I-21........................................... 2 I-22 I-23 ................................ 1 I-24 I-31 ................................ 0 I-32........................................... 2 I-33 I-35 ................................ 0 I-36........................................... 2 I-37........................................... 0 I-38 Blank................................. 0 J-1 ............................................ 3 J-2 J-8................................... 1 J.1-1 J.1-8 Added ................. 4 K-1 K-9.................................. 1 K-10 Blank ............................... 1 K.1-1 K.1-7 Added ................ 3 K.1-8 Blank .............................. 3 L-1 L-208 Added ................... 4 L-209 Added ............................ 4 L-210 Blank.............................. 4 M-1 M-208 Added ................. 4 M-209 Added ........................... 4 M-210 Blank............................ 4 Index-1 Index-2..................... 4 Index-3 Index-14................... 3 Index-15 Index-18 Added ..... 4 Index-19 Added ....................... 4 Index-20 Blank......................... 4 DA Form 2028-2 Sample......... 1 Blank........................................ 0 DA Form 2028-2(4).................. 1 DA Form 2028-2 Address(4) ... 1 Measurement Page ................. 0 Back Cover (PIN)..................... 4

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TM 9-2350-314-10 TECHNICAL MANUAL No. 9-2350-314-10 HEADQUARTERS DEPARTMENT OF THE ARMY Washington, D.C., 8 February 1999

OPERATORS MANUAL FOR HOWITZER, MEDIUM, SELF-PROPELLED: 155MM, M109A6 (NSN 2350- -305-01-0028) (EIC: 3FC)REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this publication. If you find any mistakes or if you know of a way to improve the procedures, please let us know. Submit your DA Form 2028--2 (Recommended Changes to Equipment Technical Publications), through the Internet, on the Army Electronic Product Support (AEPS) website. The Internet address is https://aeps.ria.army.mil. If you need a password, scroll down and click on ACCESS REQUEST FORM. The DA Form 2028 is located in the ONLINE FORMS PROCESSING section of the AEPS. Fill out the form and click on SUBMIT. Using this form on the AEPS will enable us to respond quicker to your comments and better manage the DA Form 2028 program. You may also mail, fax or email your letter, DA Form 2028, or DA Form 2028--2 direct to: Technical Publication Information Office, TACOM--RI, 1 Rock Island Arsenal, Rock Island, IL 61299--7630. The email address is [email protected]. The fax number is DSN 793--0726 or Commercial (309) 782--0726.Distribution Statement A: Approved for public release; distribution is unlimited.

TABLE OF CONTENTS Page HOW TO USE THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii CHAPTER 1 - INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Section I. Section II. Section III. Section IV. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1--1 Equipment Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1--11 Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1--27 Section Drill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1--40

CHAPTER 2 - OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Section I. Description and Use of Operators Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2--1

Section II. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . 2--13 Section III. Operation Under Usual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2--76 Section IV. Operation Under Unusual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2--332 CHAPTER 3 - MAINTENANCE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Section I. Lubrication Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3--1 Section II. TROUBLESHOOTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3--1 Section III. Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3--62.1 CHAPTER 4 - MAINTENANCE OF AUXILIARY EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 This manual supersedes TM 9--2350--314--10 dated 25 October 1993, including all changes Change 4 i

TM 9-2350-314-10 CHAPTER 5 - AMMUNITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Section I. Section II. Section III. Section IV. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5--1 Preparation for Firing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5--35 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5--64 Cannon--launched Guided M712 Projectile, Heat (Copperhead) and M823 Projectile (Training) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5--72

CHAPTER 6 - FOREIGN AMMUNITION (NATO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Section I. Section II. Section III. Section IV. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6--1 Projectiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6--2 Fuzes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6--12 Propelling Charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6--19

APPENDIX A - REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 APPENDIX B - COMPONENTS OF END ITEM (COEI) AND BASIC ISSUE ITEMS (BII) LISTS . . . . . . . . . . . B-1 APPENDIX C - ADDITIONAL AUTHORIZATION LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 APPENDIX D - EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST . . . . . . . . . . . . . . . . . . . . . . . . . D-1 APPENDIX E - STOWAGE AND SIGN GUIDE FOR COMPONENTS OF END ITEM, BASIC ISSUE ITEMS, AND APPLICABLE ADDITIONAL AUTHORIZATION LIST ITEMS . . . . . . . . . . E-1 APPENDIX F - EMBEDDED TRAINER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1 APPENDIX F.1 - EMBEDDED TRAINER (VERSION 7 AND 7P SOFTWARE) . . . . . . . . . . . . . . . . . . . . . . . . . . F.1-1 APPENDIX G - PDIU WARNING MESSAGES AND RECONFIGURATION ADVISOR . . . . . . . . . . . . . . . . . . . G-1 APPENDIX G.1 - PDI WARNING MESSAGES AND RECONFIGURATION ADVISOR . . . . . . . . . . . . . . . . . G.1-1 APPENDIX G.2 - PDIU WARNING MESSAGES AND RECONFIGURATION ADVISOR (VERSION 7 SOFTWARE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G.2-1 APPENDIX G.3 - PDI WARNING MESSAGES AND RECONFIGURATION ADVISOR (VERSION 7P SOFTWARE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G.3-1 APPENDIX H - CORROSION PREVENTION CONTROL (CPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-1 APPENDIX I - LUBRICATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1 APPENDIX J - AFCS/PDFCS/BCS SPHEROID AND DATUM TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J-1 APPENDIX J.1 - AFCS/PDFCS/FDC SPHEROID AND DATUM TABLE FOR VERSION 7 AND 7P SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J.1-1 APPENDIX K - M93 CHRONOGRAPH MUZZLE VELOCITY SYSTEM (MVS) . . . . . . . . . . . . . . . . . . . . . . . . . . K-1 ii Change 4

TM 9-2350-314-10 APPENDIX K.1 - PDFCS MUZZLE VELOCITY SYSTEM (PMVS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K.1-1 APPENDIX L - OPERATION OF AUTOMATIC FIRE CONTROL SYSTEM (AFCS) (VERSION 7 SOFTWARE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L-1 APPENDIX M - OPERATION OF PALADIN DIGITAL FIRE CONTROL SYSTEM (PDFCS) (VERSION 7P SOFTWARE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-1 ALPHABETICAL INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1 ALPHABETICAL INDEX (VERSION 7 AND 7P SOFTWARE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index - 15 -

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HOW TO USE THIS MANUALThis operators manual was designed to provide you with the information you will need to operate and maintain the M109A6 howitzer. The information contained in this manual is presented in chapters and appendixes. Each chapter is divided into sections to cover the subject or operating procedures for the vehicle systems or components. Where references are made to tables, figures, paragraphs and appendixes, refer to those portions of the text. To find information relating to a specific component or system: a. Determine the specific name or function of the component/system. b. Find the name or function in the Subject Index listing, located at the back of this manual. c. Refer to appropriate page(s) called out in the Subject Index listing. To find information pertaining to a broader range of information (such as vehicle troubleshooting, preventive maintenance and vehicle descriptions): a. Identify the desired topic. b. Find the general topic in the Table of Contents or in the Front Cover Index (both are located at the front of this manual). c. Refer to the appropriate page(s) called out in the Table of Contents or identified by the front cover index bleeder page.

IMPORTANT You must read and understand this manual BEFORE operating the M109A6 howitzer. Maintenance a. Throughout this manual you will frequently see the phrase notify unit maintenance. When you are instructed to notify unit maintenance, do exactly that; they have the tools and training to efficiently and correctly perform the next level of maintenance. b. Maintenance procedures are to be performed in the sequence shown in the text and illustrations. Step 1 must be performed before Step 2. Procedure A must be performed before Procedure B, and so on. c. Equipment illustrations use numbers to identify parts of the system/components.

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HOW TO USE THIS MANUAL - CONTINUED d. Throughout this manual the words WARNING, CAUTION, and NOTE will appear. There is a reason for every one of them.

WARNINGA Warning is used to alert the user to hazardous operating and maintenance procedures, practices, conditions, statements, etc. that may result in injury to or DEATH of personnel if not strictly observed.

CAUTIONA Caution is used to alert the user to hazardous operating or maintenance procedures, practices, conditions, statements, etc. that may result in damage to or destruction of equipment or of mission effectiveness if not strictly observed.

NOTEA Note is used to inform the user of essential information which is of special interest or importance or will aid the user in performing a job.

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Left Front View

Right Rear View Howitzer, Medium, Self---Propelled: 155MM, M109A6

1--0 -0

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CHAPTER 1 INTRODUCTIONSection I. GENERAL INFORMATION 1- SCOPE. -1a. b. c. d. Type of Manual: Operators Manual Equipment Name and Model Number: Howitzer, Medium, Self--Propelled: 155MM, M109A6. Purpose of Equipment: To provide artillery fire in support of ground--gaining troops. Special Inclusions: This manual includes a special section on Section Drills.

e. This manual has a companion document with TM number followed by --HR (which stands for Hand Receipt). The TM 9--2350--314--10--HR consists of preprinted hand receipts (DA Form 2062) that list end item related equipment (i.e., COEI, BII, and AAL) you must account for. As an aid to property accountability, additional --HR manuals may be requisitioned from the following source in accordance with procedures in DA PAM 25--30: The US Army Adjutant General Publications Center 2800 Eastern Boulevard Baltimore, MD 21220--2896

1- MAINTENANCE FORMS AND PROCEDURES. -2Department of the Army forms and procedures used for equipment maintenance will be those prescribed by DA PAM 738--750, The Army Maintenance Management Systems (TAMMS) as contained in Maintenance Management Update.

1- AMMUNITION. -31-3.1 Injury/Damage. Accidents involving injury to personnel or damage to materiel will be reported in accordance with AR 385--40. Explosives and ammunition malfunctions will be reported in accordance with AR 75--1. 1-3.2 Safety, Care, and Handling. For safety, care and handling of ammunition refer to paragraphs 5--16 and 5--17.

1- CORROSION PREVENTION AND CONTROL (CPC). -4For CPC instructions, refer to Appendix H.

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1- DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE. -5Destruction of the vehicle, armament, and equipment when subject to capture or abandonment in a combat zone, will be undertaken by the using army only when the unit commander decides such action is necessary in accordance with orders of, or policy established by, the Army commander. Refer to TM 750--244--6 for information on destruction of all mechanical equipment. In general, destruction of essential parts, followed by burning, will usually be sufficient to render the vehicle, armament, and equipment useless. Time is usually critical. Material must be damaged so that it cannot be restored to usable condition by either repair or cannibalization. If a lack of time or personnel prevents destruction of all parts, give priority to destruction of parts hardest to replace. It is important the same parts be destroyed on all units to prevent construction of a complete unit from several damaged ones. All items of sighting and fire control instruments and equipment, especially telescopes, gunners quadrants, and binoculars, are costly and difficult to replace. They should be conserved whenever possible. If you cannot carry them with you, destroy them by smashing with your sledge hammer, pick, or mattock. Throw the pieces in all directions. When time is short, a method of destroying the equipment with materials at hand is as follows: a. Retrieve or smash sighting and fire control equipment. b. Load cannon with projectile and full power charge. Attach a 50--ft (15.2 M) or longer lanyard to firing mechanism. Disconnect all recoil cylinders and fire the weapon. c. Bend the end of the recoil system rods with a sledge hammer.

A second method is to close the breechblock and toss several thermite grenades down the tube. Elevate the tube so that the grenades will fall against the breechblock. This will melt the breech and the powder chamber, causing them to fuse together.

1- REPORTING EQUIPMENT IMPROVEMENTS RECOMMENDATIONS (EIRs). -6If your howitzer needs improvement, let us know. Send us an EIR. You, the user, are the only one who can tell us what you dont like about your equipment. Let us know why you dont like the design or performance. Put it on an SF 368 (Product Quality Deficiency Report). Mail it to Department of the Army, U.S. Army Tank--automotive and Armaments Command, ATTN: AMSTA--LC--CIP--W, TACOM--ROCK ISLAND, 1 Rock Island Arsenal, Rock Island, IL 61299--7630. We will send you a reply.

1- WARRANTY INFORMATION. -7The M109A6 is not warranted.

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1- NOMENCLATURE CROSS-8 -REFERENCE LIST.Nomenclature in this manual was chosen in accordance with the terms used for provisioning. A few tools and cab components are referred to by more common names. In many cases, the more common name is a shorter name for the same component. OFFICIAL PROVISIONING NOMENCLATURE Ammunition Cab ammunition rack Cab assembly baskets Caliber .50 Machine Gun Computer, Digital (AFCS XXI) Computer, Digital (PDFCS) Computer, Stabilization Data Electrical lead (braided copper wire) Gage assembly Howitzer M182A1 Mount Infinity aiming reference collimator M1A1 or M1A2 Intercommunications power harness M284 cannon assembly Machine key Nonelectrical wire Rod Assembly Radar Chronograph Antenna Mounting bracket MORE COMMON NAME Ammo Ammo rack Stowage baskets .50 cal. AFCS Computer Unit (ACU) PDFCS Computer Unit (PDCU) Dynamic Reference Unit Hybrid Ground strap Sight gage M182A1 mount M1A1/M1A2 collimator Intercom power harness Cannon Torque key Lockwire, safety wire Dipstick M93 MVS

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1- NOMENCLATURE CROSS-8 -REFERENCE LIST - CONTINUED OFFICIAL PROVISIONING NOMENCLATURE Resistor, variable Seat cushion Seat, individual Sensor, vehicle Socket head screw key Spindle assembly Telescope mount M145A1 Tube assembly 155MM medium self--propelled howitzer M109A6 Viewer--infrared MORE COMMON NAME Rheostat Backrest Crew seat Vehicle Motion Sensor Hex key Obturator group or bump spindle Mount M145A1 Cannon tube Howitzer (Modified 155MM)

Night viewer

1- LIST OF ABBREVIATIONS. -9AAL ACK ACTL ACTL DEFL ACU ADAM ADS AF or AOF AFCS ALN APS ARV ASL ASP ATC AVD AZ TACH BCS BII 1-4 Change 3 Additional Authorized List Acknowledge Actual Actual Deflection AFCS Computer Unit Area Denial Artillery Munition Analog to Digital Servo Azimuth of Fire Automatic Fire Control System Alignment Air Particle Separator Ammunition Resupply Vehicle Authorized Stockage List Ammunition Supply Point Ammunition Team Chief Alternate Vehicle Driver Azimuth Tachometer Battery Computer System Basic Issue Item

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1- LIST OF ABBREVIATIONS - CONTINUED -9 BIT BITE C CCW CEOI CHG CLR CM CMD CMD DEFL CLGP COEI COMSEC COS CPC CPCI CS CTA CW DAP DC DCA DCU DEFL DESTN DGRD DPICM DRUH DU EFC EIR EL Panel EL Tach EMB TNG EMI/EMC EMR Built--In--Test Built--In--Test Equipment Degrees Celsius Counterclockwise Communications Electronics Operating Instructions Charge Clear Centimeter Command Command Deflection Cannon--Launched Guided Projectile Component of End Item Communications Security Chief of Section Corrosion Prevention and Control Computer Program Configuration Item Center Sector Common Table of Allowances Clockwise Distant Aiming Point Danger Close Diagnostic Connector Assembly Display Control Unit Deflection Destination Degraded Dual Purpose Improved Conventional Munitions Dynamic Reference Unit Hybrid Display Unit Equivalent Full Charge Equipment Improvement Recommendation Electroluminescent Panel Elevation Tachometer Embedded Training Electromagnetic Interference/Compatibility Electromagnetic Radiation

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1- LIST OF ABBREVIATIONS - CONTINUED -9 ENT EOD EOL EOM EPLRS ET F FDC FES FFCS FPF FPF/PRI GNR GPS HD HE HEAT HGBV HPCOS HPCV HR ICM KG KMPH L LCD LED LHR LPCOS LPFS LPRS LRU LS M M MACS MAPS MAX MCS MCSRP MCSVIS MHZ MIN MOPP 1-6 Change 4 Enter Explosive Ordnance Disposal End of Orienting Line End of Mission Enhanced Position Location Reporting System Embedded Training Degrees Fahrenheit Fire Direction Center Fire Extinguishing System Full Function Crew Station Final Protective Fire Final Protective Fire/Priority Gunner Global Positioning System Howitzer Driver High--Explosive High Explosive Anti--Tank Hot Gas Bypass Valve High Pressure Cutout Switch Head Pressure Control Valve Hand Receipt Improved Conventional Munitions Kilogram Kilometers Per Hour Liter Liquid Crystal Display Light Emitting Diode Low Heat Rejection Low Pressure Cutout Switch Lead Particulate Filter System Loose Projectile Restraint System Line Replaceable Unit Left Sector Meter Mils Modular Artillery Charge System Modular Azimuth Positioning System Maximum Microclimate Conditioning System MCS Relay Panel Master Control Station Vehicle Intercom System Megahertz Minimum Mission Oriented Protective Posture

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1- LIST OF ABBREVIATIONS - CONTINUED -9 MOUT MOVE ORD M/S MT MTOE MTSQ MWRH MVS MVV NAV NBC OL OS PANTEL PCU PCU--2 PD PDI PDIU PDCU PDFCS PDU PK PLGR PLL PLRS PMCS PMVS POC POSN PRI PROP PRV PSIAD PSI PT PUCT QE RAAM RAP RCVD MSG RFI RNDS RNG RPM Military Operations in Urban Terrain Move Order Meters Per Second Mechanical Time Modified Table of Organization and Equipment Mechanical Time Super Quick Mounted Water Ration Heater Muzzle Velocity Sensor Muzzle Velocity Variance Navigation Nuclear, Biological, Chemical Orienting Line Orienting Station Panoramic Telescope Power Conditioner Unit (AFCS) Power Conditioner Unit--2 (PDFCS) Point Detonating Prognostic/Diagnostic Interface Prognostic/Diagnostic Interface Unit Paladin Digital Computer Unit Paladin Digital Fire Control System PDFCS Display Unit Pack Precision Lightweight GPS (Global Positioning System) Receiver Prescribed Load List Position Location Reference System Preventive Maintenance Checks and Services Paladin Muzzle Velocity System Platoon Operation Center Position Priority Propellant Pressure Relief Valve Paladin Serial Interface Adapter Device Pounds Per Square Inch Participating Power Up Confidence Test Quadrant Elevation or Quadrant Entry Remote Anti--Armor Mine Rocket Assisted Projectile Received Message Radio Frequency Interface Rounds Range Revolutions Per Minute Change 4 1-7

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1- LIST OF ABBREVIATIONS - CONTINUED -9 RS S&A SD SE SPH SINCGARS SQ SRU STE STE/ICE--R TEV TOE TOT TR TSOP TTS URO UTM VEH PWR VEL VFPS VLY VIS VMS VMS Modem VT WARN MSG WC WP ZUPT Right Sector Safe and Arming Section Driver Support Equipment Self--Propelled Howitzer Single Channel Ground and Airborne Radio System Super Quick Shop Replaceable Unit Simplified Test Equipment Simplified Test Equipment for Internal Combustion Engines Reprogrammable Thermostatic Expansion Valve Table of Organization and Equipment Time On Target Training Tactical Standard Operating Procedures Tube Temperature Sensor (Main Gun Tube) User Read Out Universal Transverse Mercator Vehicle Power Velocity Ventilated Face Piece System Volley Vehicular Intercommunications System Vehicle Motion Sensor Vehicle Motion Sensor Modem Variable Time Warning Message Weapon Controller White Phosphorus Zero Velocity Update

1-10 GLOSSARY.ALPHANUMERIC ANGULAR BINARY Boot Dongle CELSIUS Consisting of alphabetical and numerical symbols in sequence. Measured by an angle or degree of an arc. Characterized by or composed of two different parts. A device required for PDFCS to boot without a keyboard. A temperature scale that registers the freezing point of water as 0C and the boiling point as 100C under normal atmospheric pressure. Change 3

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1-10 GLOSSARY - CONTINUED CENTRIFUGALLY Moving or directed away from center or axis.

CHRONOGRAPH

An instrument that registers or graphically records time intervals such as the duration of an event. To make parallel. A manually controlled bright figure on a computer display to indicate a character to be revised or a position where data is to be entered Considered as below a normal standard. The direct conversion of electric energy to light by a solid phosphor subjected to an alternating electric field. A temperature scale that registers the freezing point of water as 32F and the boiling point as 212F under standard atmospheric pressure. A unit of frequency equal to one cycle per second. To begin a process or action. The place at which independent systems meet and act on or communicate with each other. The science dealing with the weather conditions. The climate of a specific place within an area, contrasted with the climate of the area as a whole. A device that converts data to a form that can be transferred. Constructed with standardized units or dimensions for flexible use. Not explosive. A device for sealing a gun breech to prevent gas from escaping on firing. The apparent displacement or the difference in apparent direction of an object as seen from different points not on a straight line with the object. Formed of separate particles. A sign or indication of some future happening. Something that propels or provides thrust. A pattern of bursts on a target. A survey of a particular portion of the earths surface. 1-9

COLLIMATION CURSOR

DEGRADED ELECTROLUMINESCENT

FAHRENHEIT

HERTZ INITIALIZED INTERFACE

METEOROLOGICAL MICROCLIMATE

MODEM MODULAR NONVOLATILE OBTURATOR

PARALLAX

PARTICULATES PROGNOSTIC PROPELLANT SHEAF SPHEROID

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1-10 GLOSSARY - CONTINUED SYNCHRONIZATION TOXIC TRANSIENCE To cause to operate with exact coincidence in time and rate. Harmful, destructive or deadly. A temporary oscillation that occurs in circuits because of a sudden change of voltage or load. The degree to which fluid resists flow under applied force.

VISCOSITY

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Section II. EQUIPMENT DESCRIPTION 1-11 EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES.1-11.1 Characteristics. The medium self--propelled howitzer is a full--tracked, armored combat support, internally loaded, air transportable, diesel--powered vehicle with excellent ground mobility. The primary armament includes a 155MM M284 cannon and M182A1 mount, with firing accomplished by an M49 firing mechanism which uses cartridge type primers. The vehicle carries a crew of four: chief of section, gunner, cannoneer, and driver. 1-11.2 Capabilities and Features.

Max Speed 38 MPH (61 KMPH) Max Range 186 Miles (299 KM) 155MM, M284 Cannon M182A1 Mount 650 Amp Alternator Starter Protection Circuits Final Drive Quick--Disconnects Independent Torsion Bars Remotely Operated Travel Lock Microclimate Conditioning System Prognostics/Diagnostics Capability (PDIU/PDI/STE/ICE--R) On--Board Ballistic Calculation (AFCS/PDFCS) On--Board Communications (Digital and Voice) Compartmentalized Hydraulic Components Desert Cooling MAPS (Modular Azimuth Positioning System) Lead Particulate Filter and Ventilation System Higher Power Transmission Low Heat Rejection Engine

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1-12 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.1-12.1 Exterior Components 1 2 3 CANNON M284--155MM GUN TUBE TRAVEL LOCK REPLENISHER Provides main armament for howitzer. Provides support for gun tube during travel. Allows for change in quantity of oil required by the recoil cylinders and for expansion and contraction of hydraulic fluid due to temperature changes. Two front lifting brackets and two rear lifting eyes provide connecting points for lifting cab. Provides protection for variable recoil and recuperator from small arms fire and shrapnel. Provides for air and troop defense. Refer to TM 9--1005--213--10 for description. Provides mounting for the M140/M140A1 alignment device during boresighting of the M117A2 Pantel. Protects panoramic telescope (Pantel) against shock during firing and against inclement weather. Antennas receive and transmit EPLRS radio signals. Two antennas receive and transmit radio signals. Provides emergency exit. Permits access to hydraulic compartment. Actuates engine compartment fire extinguisher from outside the howitzer. Seven sets of roadwheels on each side provide support and guides for the track. Permits access to hydraulic compartment. Two doors provide access to batteries. Drive sprockets, two each side, transfer power from the transmission and final drive to track. Two track assemblies provide mobility for the vehicle. Two doors provide access to front of powerpack. Two front towing eyes provide connection points for towing howitzer. Two lifting eyes provide connection points for lifting howitzer. Two headlights provide light for night driving and blackout conditions.

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CAB LIFTING BRACKETS BALLISTIC SHIELD MACHINE GUN .50 CAL M140/M140A1 MOUNTING BRACKET BALLISTIC COVER

9.1 EPLRS ANTENNA 9 ANTENNAS

10 CAB SIDE DOOR 11 HYDRAULIC COMPARTMENT ACCESS COVER 12 EXTERNAL FIRE EXTINGUISHER T--HANDLE 13 ROADWHEELS 14 HYDRAULIC COMPARTMENT ACCESS DOOR 15 BATTERY ACCESS DOORS 16 DRIVE SPROCKETS 17 TRACK ASSEMBLY 18 TRANSMISSION ACCESS DOORS 19 FRONT TOWING EYES 20 FRONT LIFTING EYES 21 HEADLIGHTS

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TM 9-2350-314-10

1-12 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - CONTINUED 1-12.1 Exterior Components - Continued -

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TM 9-2350-314-10

1-12 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - CONTINUED 1-12.1 Exterior Components - Continued 1 2 STOWAGE BASKETS PLGR ANTENNA Two baskets provide stowage for miscellaneous items. The Precision Lightweight GPS (Global Positioning System) Receiver (PLGR) antenna is used to support the Satellite Signals Navigation Set (AN/PSN--11) Provides access to machine gun. Rotates manually 6400 mils. Provides outlet for engine exhaust. Provide connecting points for wire line communications. Two rear lifting eyes provide connection points for lifting howitzer. NATO type power receptacle provides circuitry to receive power from an outside source. Two taillight units provide rear brake and taillights for night driving under normal and blackout (infrared) conditions. Idler wheels, two each side, maintain track tension. Provides communications capabilities outside of howitzer. Provides access to and from crew compartment. Provides connecting point for towing howitzer. Two rear towing eyes provide connection points for howitzer towing. Two boxes provide stowage for grenades. Two spades provide stability when firing off of loose, sandy, or muddy soils. Also used when mated with ARV. Provides stowage for three AT4 rocket launchers.

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COMMANDERS CUPOLA

Howitzer, Medium Self Propelled 155mm m109a6

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Transcript of Howitzer, Medium Self Propelled 155mm m109a6